 

(function($) {
    $.getUrlParam = function(name) {
        var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
        var r = window.location.search.substr(1).match(reg);
        if (r != null )
            return unescape(r[2]);
        return null ;
    }
}
)(jQuery);
